Question

The undisturbed soil at given borrow pit is found to have the following property:
w = 15%; y = 19.1 kN/m^3; Gs = 270
The soil from this borrow pit is to be used to construct a rolled fill having a finished volume of 38, 500 m^3. The soil is excavated by means of a shovel and dumped onto trucks saving a capacity of 4 00 m^3 each. When loaded to capacity, these trucks are found to contain, on the average, a net weight of toil and water equal to 72.7 kN
In the construction process. the trucks dump their load on the fill and the materials spread and broken up, after which a sprinkler adds water until the moisture content is equal to 18%. The soil and water are thoroughly mixed by a disc (or similar equipment) and then compacted until the dry unit weight is equal to 17.3 kN/m^3.
1. Assuming that each load is a full capacity load, how many truckloads are required to construct the fill?
2. How many liters of water will have to be added per truck load, assuming that the moisture tots by evaporation during excavation, haulage, and handling it negligible?

Answer 1

Answer:

Check the explanation

Explanation:

Determine the weight o ids in the each truck °slim the relation,  

W,=$\frac{W}{1+w}$

Here, W is net weight of soil and water on the truck and w is water content  

substitute 72 7 kN for W and 15% for w.

you will need to also determine the number of truck loads required using the relation:

Number of truck loads required = $\frac{W_{sc} }{W_{s}}$

Kindly check the attached image below for the full explanation to the question above.